在暴露于空气的固体表面上,土壤氨氧化古生物的生长
Christiana Abiola1, Joo-Han Gwak1, Ui-Ju Lee1
1Department of Biological Sciences and Biotechnology, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju 28644, Republic of Korea.
ISME communications
|November 15, 2024
概括
土壤氨氧化古生物 (AOA) 与细菌不同,在暴露在空气中的表面表现出抑制的活性. 这项研究揭示了独特的AOA适应,包括对生存的基因上调和固体表面上独特的社区丰富.
科学领域:
- 环境微生物学 环境微生物学
- 土壤科学 土壤科学
- 生物地质化学生物地质化学
背景情况:
- 土壤微生物,包括氨氧化微生物 (AOMs),在土壤聚合物中形成微殖民地或生物膜.
- 以前的AOM生理学研究主要使用液体介质中的浮游生物细胞,而不是模拟自然的土壤表面条件.
研究的目的:
- 研究土壤氨氧化古生物 (AOA) 和细菌在暴露在空气中的固体表面的生长和氨氧化活性.
- 了解AOA对这些环境的适应机制.
主要方法:
- 培养 *Nitrososphaera viennensis* EN76, "*Nitrosotenuis chungbukensis*" MY2 (AOA) 和 *Nitrosomonas europaea* ATCC 19718 (AOB) 在聚碳酸盐膜过器上,这些过器漂浮在液体介质上.
- 测量氨氧化活性.氨氧化活性.
- 对 *N. viennensis* EN76.76 的转录组分析.
- 对AOA社区结构的分析.
主要成果:
- 与液体介质相比,AOA (*N. viennensis*, "*N. chungbukensis*") 的氨氧化活性在浮式过器上被抑制.
- *Nitrosomonas europaea* (AOB) 在过器和液体介质上表现出类似的活性.
- 对 *N. viennensis* 的转录组分析揭示了细胞壁生物合成,氨氧化和氧化应激防御的基因的上调调节.
- 浮式过技术丰富了不同的土壤AOA社区,以"Ca. 它们属于"Nitrosocosmicus"类.
结论:
- 与AOB相比,AOA在暴露于空气的固体表面上生长时会表现出不同的生理反应和适应策略.
- 与细胞表面结构和应激防御相关的高调基因对于AOA适应至关重要.
- 浮式波器方法对于研究AOA生理学和丰富特定土壤AOA社区是有效的.
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